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<div class="title">FastCRC.h</div>  </div>
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<a href="_fast_c_r_c_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/* FastCRC library code is placed under the MIT license</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * Copyright (c) 2014,2015 Frank Bosing</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> * Permission is hereby granted, free of charge, to any person obtaining</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * a copy of this software and associated documentation files (the</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * &quot;Software&quot;), to deal in the Software without restriction, including</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"> * without limitation the rights to use, copy, modify, merge, publish,</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment"> * distribute, sublicense, and/or sell copies of the Software, and to</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment"> * permit persons to whom the Software is furnished to do so, subject to</span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment"> * the following conditions:</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment"> * The above copyright notice and this permission notice shall be</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment"> * included in all copies or substantial portions of the Software.</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment"> * THE SOFTWARE IS PROVIDED &quot;AS IS&quot;, WITHOUT WARRANTY OF ANY KIND,</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment"> * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF</span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="comment"> * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="comment"> * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS</span></div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="comment"> * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="comment"> * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN</span></div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="comment"> * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="comment"> * SOFTWARE.</span></div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160; </div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160; </div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="comment">// Teensy 3.0, Teensy 3.1:</span></div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="comment">// See K20P64M72SF1RM.pdf (Kinetis), Pages 638 - 641 for documentation of CRC Device</span></div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="comment">// See KINETIS_4N30D.pdf for Errata (Errata ID 2776)</span></div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="comment">// So, ALL HW-calculations are done as 32 bit.</span></div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="comment">// Thanks to:</span></div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="comment">// - Catalogue of parametrised CRC algorithms, CRC RevEng</span></div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="comment">// http://reveng.sourceforge.net/crc-catalogue/</span></div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="comment">// - Danjel McGougan (CRC-Table-Generator)</span></div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160; </div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="comment">// modify from FastCRC library @ 2018/11/20</span></div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160; </div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="preprocessor">#ifndef FASTCRC_FASTCRC_H_</span></div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;<span class="preprocessor">#define FASTCRC_FASTCRC_H_</span></div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160; </div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;<span class="preprocessor">#include &lt;stdint.h&gt;</span></div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160; </div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160; </div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;<span class="comment">// ================= 16-BIT CRC ===================</span></div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160; </div>
<div class="line"><a name="l00053"></a><span class="lineno"><a class="line" href="class_fast_c_r_c16.html">   53</a></span>&#160;<span class="keyword">class </span><a class="code" href="class_fast_c_r_c16.html">FastCRC16</a> {</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;<span class="keyword">public</span>:</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;  <a class="code" href="class_fast_c_r_c16.html#a5b5fba9414abaf0eadca4c268828884b">FastCRC16</a>(uint16_t seed);</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160; </div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;  <span class="comment">// change function name from mcrf4xx_upd to mcrf4xx</span></div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;  uint16_t <a class="code" href="class_fast_c_r_c16.html#aa127f7c21a5ab74c0c30619ade0181b4">mcrf4xx_calc</a>(<span class="keyword">const</span> uint8_t *<a class="code" href="namespacefmt_1_1v5_1_1internal.html#ac62a332ee64650f2ebe0e8095fa8e7c0">data</a>,<span class="keyword">const</span> uint16_t datalen); <span class="comment">// Equivalent to _crc_ccitt_update() in crc16.h from avr_libc</span></div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160; </div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;<span class="keyword">private</span>:</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;  uint16_t seed_;</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160; </div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;};</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160; </div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;<span class="comment">// ================= 32-BIT CRC ===================</span></div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160; </div>
<div class="line"><a name="l00067"></a><span class="lineno"><a class="line" href="class_fast_c_r_c32.html">   67</a></span>&#160;<span class="keyword">class </span><a class="code" href="class_fast_c_r_c32.html">FastCRC32</a> {</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;<span class="keyword">public</span>:</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;  <a class="code" href="class_fast_c_r_c32.html#ae139e3fbeeb7adec610d50d638607c7d">FastCRC32</a>(uint32_t seed);</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160; </div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;  <span class="comment">// change function name from crc32_upd to crc32</span></div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;  uint32_t <a class="code" href="class_fast_c_r_c32.html#ade987c2d06975707d94aa2eaa203a480">crc32_calc</a>(<span class="keyword">const</span> uint8_t *<a class="code" href="namespacefmt_1_1v5_1_1internal.html#ac62a332ee64650f2ebe0e8095fa8e7c0">data</a>, uint16_t len);           <span class="comment">// Call for subsequent calculations with previous seed</span></div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160; </div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;<span class="keyword">private</span>:</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;  uint32_t seed_;</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;};</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160; </div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;<span class="preprocessor">#endif // FASTCRC_FASTCRC_H_</span></div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160; </div>
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<div class="ttc" id="anamespacefmt_1_1v5_1_1internal_html_ac62a332ee64650f2ebe0e8095fa8e7c0"><div class="ttname"><a href="namespacefmt_1_1v5_1_1internal.html#ac62a332ee64650f2ebe0e8095fa8e7c0">fmt::v5::internal::data</a></div><div class="ttdeci">basic_data data</div><div class="ttdef"><b>Definition:</b> <a href="format_8h_source.html#l00764">format.h:764</a></div></div>
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<div class="ttc" id="aclass_fast_c_r_c16_html_aa127f7c21a5ab74c0c30619ade0181b4"><div class="ttname"><a href="class_fast_c_r_c16.html#aa127f7c21a5ab74c0c30619ade0181b4">FastCRC16::mcrf4xx_calc</a></div><div class="ttdeci">uint16_t mcrf4xx_calc(const uint8_t *data, const uint16_t datalen)</div></div>
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<div class="ttc" id="aclass_fast_c_r_c16_html"><div class="ttname"><a href="class_fast_c_r_c16.html">FastCRC16</a></div><div class="ttdef"><b>Definition:</b> <a href="_fast_c_r_c_8h_source.html#l00053">FastCRC.h:53</a></div></div>
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